Haven't used it yet
I recently ordered the Boye Crochet Dude Blocking Board with Grids. I am very happy with them. I wanted "boards" with a grid pattern on them so I could ensure the squares for my quilt were blocked straight and square. These were the best "boards" I found that had the grids. I saw "packages" of boards, but read in some of the comments that sometimes when people purchased more than one set later on, the squares did not interlock. It seems like one set was cut to match but there was no guarantee if sets purchased in the future would interlock. I was initially looking to buy a "set" of boards, but liked the fact that the Boye Crochet Dude ones do interlock and are always going to be the same dimensions to work.